CN106808037A - Micro- textured electrodes wire material of imitative fish scale and preparation method and application - Google Patents

Abstract

The present invention relates to micro- textured electrodes wire material of imitative fish scale and preparation method and application.Specifically, the invention discloses a kind of electrode wire material, the wire electrode material surface has the micro- texture layer of imitative fish scale, and the electrode wire material includes：I) as the alloy substrate layer of internal layer；Ii) as the diffusion layer in intermediate layer；And iii) as the coating of outer layer；Also, the electrode wire material is 105-150 ° to the contact angle of coolant.Preparation method and application the invention also discloses the electrode wire material.Wire electrode of the invention can obviously reduce Cutting Drag due to its special surface biomimetic structure, improve cooldown rate, and then improve rate of cutting, be effectively improved the performance of wire electrode.The characteristics of preparation method has process is simple, is easy to industrialized production.

Description

Imitation fish scale micro-textured electrode wire material and its preparation method and application

technical field

The invention relates to the field of materials, in particular to an electrode wire material with imitation fish scale micro-texture and a preparation method and application thereof.

Background technique

EDM is mainly used in mold manufacturing, and it is also increasingly widely used in the processing of forming tools, precision small parts and special materials. The cutting speed of EDM affects production efficiency. Therefore, how to increase the cutting speed of wire has been It is a key research direction in related fields.

In terms of equipment, processing technology and cutting electrode wire, the material, surface state and thermophysical properties of the electrode wire are the key factors affecting the cutting efficiency. During the cutting process, the electrode wire is prone to overheating and fuse due to absorbing a large amount of heat, which requires improving the cooling efficiency of the electrode wire; at the same time, abrasive debris is easy to accumulate in the cutting area, which requires smooth discharge of abrasive debris.

In order to meet the increasing market demand, there is an urgent need in this field to develop a new electrode wire material with excellent cutting performance and a preparation method thereof.

Contents of the invention

The purpose of the present invention is to provide a novel electrode wire material with excellent cutting performance and a preparation method thereof.

According to the first aspect of the present invention, a wire electrode material is provided, the surface of the wire electrode material has a fish scale-like micro-texture layer, and the wire electrode material includes:

i) an alloy matrix layer as an inner layer;

ii) an interdiffusion layer as an intermediate layer; and

iii) plating as an outer layer;

Moreover, the contact angle of the electrode wire material to the cooling liquid is 105-150°.

In another preferred example, the contact angle of the electrode wire material to the cooling liquid is 107-140°.

In another preferred example, the contact angle of the electrode wire material to the cooling liquid is 110-135°, preferably 112-130°.

In another preferred example, the diameter of the electrode wire material is 0.05-1 mm, preferably 0.1-0.8 mm, more preferably 0.15-0.6 mm.

In another preferred example, in the wire electrode material, the diameter of the inner layer is 0.15-0.6 mm; and/or

The thickness of the intermediate layer is 5-30 μm; and/or

The thickness of the outer layer is 2-20 μm.

In another preferred example, the inner layer has a diameter of 0.15-0.4mm.

In another preferred example, the thickness of the intermediate layer is 10-20 μm.

In another preferred example, the thickness of the outer layer is 4-10 μm.

In another preferred example, the thickness of the fish scale-like micro-texture layer is 2-20 μm.

In another preferred example, the thickness of the fish scale-like micro-texture layer is 3-18 μm, preferably 5-15 μm.

In another preferred example, the elements constituting the alloy matrix layer are selected from the group consisting of copper, zinc, tin, lead, or combinations thereof.

In another preferred example, the elements forming the interdiffusion layer are selected from the group consisting of copper, zinc, tin, lead, or combinations thereof.

In another preferred embodiment, the elements forming the coating are selected from the group consisting of copper, zinc, tin, lead, or combinations thereof.

In another preferred example, the tensile strength of the electrode wire material is 900-1200MPa, preferably 1100MPa-1200MPa.

In another preferred example, the elongation of the electrode wire material is 1-5%, preferably 3-5%.

In another preferred example, the electrode wire material is prepared by the method described in the second aspect of the present invention.

The second aspect of the present invention provides a method for preparing the electrode wire material described in the first aspect of the present invention, comprising the following steps:

1) providing a coated electrode wire, and heat-treating the coated electrode wire to obtain a heat-treated electrode wire;

2) The heat-treated wire electrode obtained in the drawing treatment step 1) to obtain the drawn wire electrode; and

3) The annealing treatment step 2) obtains the drawn electrode wire to obtain the electrode wire material described in the first aspect of the present invention.

In another preferred example, the coated wire electrode includes an alloy layer as a core layer and a metal coating on the surface of the core layer.

In another preferred example, the material forming the alloy layer is selected from the group consisting of copper alloy and stainless steel.

In another preferred embodiment, the metal constituting the metal coating is selected from the group consisting of zinc, copper, tin, lead, or combinations thereof.

In another preferred example, the diameter of the coating electrode wire is 0.01-5 mm, preferably 0.05-3 mm, more preferably 0.1-2 mm.

In another preferred example, the metal coating has a thickness of 1-50 μm, preferably 2-30 μm, more preferably 4-15 μm.

In another preferred example, the heat treatment temperature of the heat treatment in step 1) is 550-850°C; and/or

Step 1) The heat treatment time at the heat treatment temperature is 5s-60s.

In another preferred example, the heat treatment temperature of the heat treatment in step 1) is 580-830°C, preferably 600-800°C.

In another preferred example, the heat treatment time in step 1) at the heat treatment temperature is 8-55s, preferably 10s-50s.

In another preferred example, the heat treatment in step 1) is selected from the group consisting of resistance heating, radiation heating, or a combination thereof.

In another preferred example, the heat treatment in step 1) is a composite heating method of resistance heating and radiation heating.

In another preferred example, the resistance heating is performed by the resistance heating of the coating electrode wire itself. When resistance heating is used, the power applied to the coating electrode wire is 0.1-10KW, preferably 0.3-5KW.

In another preferred example, the radiation treatment temperature in the radiation heating zone is 550-850°C, preferably 600-800°C.

In another preferred example, the radiation treatment time at the radiation treatment temperature is 5-60s, preferably 15-30s.

In another preferred example, the diameter of the heat-treated electrode wire is 0.03-5 mm, preferably 0.05-4.5 mm.

In another preferred example, the heat-treated wire electrode includes: a first inner layer, a first middle layer and a first outer layer.

In another preferred example, the diameter of the first inner layer is 0.02-4 mm, preferably 0.5-3 mm.

In another preferred example, the thickness of the first intermediate layer is 3-30 μm, preferably 5-20 μm.

In another preferred example, the thickness of the first outer layer is 2-20 μm, preferably 5-10 μm.

In another preferred example, the drawing treatment in step 2) is carried out in a lubricating oil tank; and/or

Step 2) the drawing treatment is carried out at room temperature; and/or

Step 2) The drawing speed of the drawing treatment is 600-1500m/min.

In another preferred example, the drawing speed of the drawing treatment in step 2) is 700-1400m/min, preferably 800-1300m/min.

In another preferred example, the diameter of the drawn electrode wire is 0.1-1 mm, preferably 0.15-0.6 mm.

In another preferred example, the annealing temperature of the annealing treatment in step 3) is 20-100°C; and/or

Step 3) The annealing time of the annealing treatment at the annealing temperature is 1s-20s.

In another preferred example, the annealing temperature of the annealing treatment in step 3) is 30°C-80°C, preferably 35-70°C.

In another preferred example, the annealing treatment time in step 3) at the annealing treatment temperature is 3-15s, preferably 4-10s.

In another preferred example, the annealing treatment in step 3) is carried out by electrically heating the wire-wound copper roll, and the voltage is 10-50V and the current is 5-30A during the annealing treatment.

The third aspect of the present invention provides the use of the electrode wire material described in the first aspect of the present invention for precision cutting.

The fourth aspect of the present invention provides a product, which contains or is made of the electrode wire material described in the first aspect of the present invention.

It should be understood that within the scope of the present invention, the above-mentioned technical features of the present invention and the technical features specifically described in the following (such as embodiments) can be combined with each other to form new or preferred technical solutions. Due to space limitations, we will not repeat them here.

Description of drawings

Fig. 1 is a schematic structural view of the electrode wire material with imitation fish scale micro-texture according to the present invention.

Fig. 2 is a process schematic diagram of the preparation method of the present invention.

FIG. 3 is the SEM cross-sectional morphology test result of the heat-treated three-layer wire blank 1 in Example 1. FIG.

Fig. 4 is the SEM surface topography test result of the electrode wire material 1 obtained in Example 1, wherein (a) is the fish scale topography, and (b) is the enlarged SEM surface topography of the electrode wire material 1.

FIG. 5 is the SEM cross-sectional morphology test result of the wire electrode material 1 obtained in Example 1. FIG.

Figure 6 is the contact angle test results of copper alloy wire, copper alloy wire 1 and electrode wire material 1 with cooling liquid, where (a) is copper alloy wire, (b) is copper alloy wire 1, (c) and (d) are electrode wire material 1 with imitation fish scale micro-texture.

FIG. 7 is a graph comparing the relative cutting speeds of copper alloy wire, copper alloy wire 1 and electrode wire material 1. FIG.

Fig. 8 is the test results of the three-dimensional shape of the mold steel sample after being cut by copper alloy wire 1 and electrode wire material 1 respectively at the same cutting speed, where (a) is the three-dimensional shape of the sample after being cut by copper alloy wire 1 (b) is the three-dimensional morphology after cutting the fish scale micro-textured electrode wire material 1.

Fig. 9 is the SEM surface topography test result of electrode wire material 2-4 obtained in Example 2-4, wherein (a) is electrode wire material 2, (b) is electrode wire material 3, and (c) is electrode wire material 4 .

FIG. 10 is the SEM surface morphology test result of the wire electrode material C1 obtained in Comparative Example 1.

Fig. 11 is the SEM surface morphology test result of the wire electrode material C2 obtained in Comparative Example 2.

detailed description

After long-term and in-depth research, the present inventor has prepared a special bionic structure electrode wire material by adopting a specific preparation process. Specifically, the inventors used a specific heat treatment process combined with a specific drawing process to prepare a wire electrode material with a fish scale-like micro-texture surface morphology. The porous surface of the material makes the wire electrode material compatible with the cut sample The resistance of the wire electrode is significantly reduced, and it can effectively improve the discharge of abrasive chips during the cutting process and the circulation effect of the coolant, and finally increase the cutting speed of the wire electrode. On this basis, the inventors have completed the present invention.

the term

As used herein, the term "coolant" refers to an industrial liquid used for cooling and lubricating cutting tools and workpieces in metal cutting and grinding processes, which has good cooling performance, lubricating performance, antirust performance, Oil cleaning function and anti-corrosion function.

Wire material

The invention provides an electrode wire material, the surface of the electrode wire material has a fish scale imitation micro-texture layer, and the electrode wire material includes:

i) an alloy matrix layer as an inner layer;

ii) an interdiffusion layer as an intermediate layer; and

iii) plating as an outer layer;

Moreover, the contact angle of the electrode wire material to the cooling liquid is 105-150°.

Fig. 1 is a schematic structural view of the electrode wire material with imitation fish scale micro-texture according to the present invention.

In another preferred example, the contact angle of the electrode wire material to the cooling liquid is 107-140°.

In another preferred example, the contact angle of the electrode wire material to the cooling liquid is 110-135°, preferably 112-130°.

In another preferred example, the diameter of the electrode wire material is 0.05-1 mm, preferably 0.1-0.8 mm, more preferably 0.15-0.6 mm.

In another preferred example, in the wire electrode material, the diameter of the inner layer is 0.15-0.6 mm; and/or

The thickness of the intermediate layer is 5-30 μm; and/or

The thickness of the outer layer is 2-20 μm.

In another preferred example, the inner layer has a diameter of 0.15-0.4mm.

In another preferred example, the thickness of the intermediate layer is 10-20 μm.

In another preferred example, the thickness of the outer layer is 4-10 μm.

In another preferred example, the thickness of the fish scale-like micro-texture layer is 2-20 μm.

In another preferred example, the thickness of the fish scale-like micro-texture layer is 3-18 μm, preferably 5-15 μm.

It should be understood that when the thickness of the fish-like scale micro-texture layer is greater than 20 μm, the depth of the micro-structure of the fish-like scale micro-texture layer is relatively shallow, so that the contact angle between the electrode wire and the cooling liquid is reduced, and the cutting speed of the electrode wire is reduced. Reduce; when the thickness of the imitation fish scale micro-texture layer is less than 2 μm, the imitation fish scale micro-texture layer is too thin and prone to premature failure due to wear, so that the cutting speed of the electrode wire cannot be effectively improved.

In the present invention, in the electrode wire material, the elements in the inner layer, middle layer and outer layer are formed by thermal diffusion, so there will be a certain concentration gradient of the elements.

In another preferred example, the elements constituting the alloy matrix layer include (but are not limited to): copper, zinc, tin, lead, or a combination thereof.

In another preferred example, the elements forming the interdiffusion layer include (but are not limited to): copper, zinc, tin, lead, or a combination thereof.

In another preferred example, the elements constituting the coating include (but are not limited to): copper, zinc, tin, lead, or a combination thereof.

In another preferred example, the tensile strength of the electrode wire material is 900-1200MPa, preferably 1100MPa-1200MPa.

In another preferred example, the elongation of the electrode wire material is 1-5%, preferably 3-5%.

In another preferred example, the electrode wire material is prepared by the method described in the present invention.

In the present invention, since the surface of the electrode wire material has a special imitation fish scale micro-texture, the electrode wire material has a larger contact angle to the cooling liquid, thereby significantly improving the cooling effect of the cooling liquid, and greatly improving the cooling effect of the cooling liquid. cutting speed.

Preparation

The present invention also provides a preparation method of the electrode wire material, comprising the following steps:

1) providing a coated electrode wire, and heat-treating the coated electrode wire to obtain a heat-treated electrode wire;

2) The heat-treated wire electrode obtained in the drawing treatment step 1) to obtain the drawn wire electrode; and

3) Annealing treatment Step 2) obtained the drawn electrode wire to obtain the electrode wire material.

Fig. 2 is a process schematic diagram of the preparation method of the present invention.

In another preferred example, the coated wire electrode includes an alloy layer as a core layer and a metal coating on the surface of the core layer.

In another preferred example, the materials constituting the alloy layer include (but are not limited to): copper alloy and stainless steel.

In another preferred example, the metals constituting the metal coating include (but are not limited to): zinc, copper, tin, lead, or a combination thereof.

In another preferred example, the diameter of the coating electrode wire is 0.01-5 mm, preferably 0.05-3 mm, more preferably 0.1-2 mm.

In another preferred example, the metal coating has a thickness of 1-50 μm, preferably 2-30 μm, more preferably 4-15 μm.

It should be understood that in the present invention, the selection of the thickness of the metal coating of the coated electrode wire in step 1) has an important influence on the subsequent heat treatment step and drawing step. When the thickness of the metal coating is greater than 50 μm, the metal coating and the inner matrix layer cannot interdiffuse well during the heat treatment process, and the above-mentioned wire blanks with insufficient interdiffusion cannot obtain obvious imitation in the subsequent drawing step. Fish scale micro-texture structure; when the thickness of the metal coating is less than 1 μm, the zinc coating is lost due to high-temperature melting and sublimation, so that it cannot form interdiffusion with the substrate, which in turn affects the preparation of the imitation fish scale micro-texture structure, and ultimately affects the electrode. wire cutting speed.

In another preferred example, the heat treatment temperature of the heat treatment in step 1) is 550-850°C; and/or

Step 1) The heat treatment time at the heat treatment temperature is 5s-60s.

It should be understood that in the preparation method of the present invention, the temperature range and time range of the heat treatment in step 1) also have an important impact on the performance of the final prepared wire electrode material. When the heat treatment temperature is lower than 550°C, the wire electrode material obtained through the heat treatment does not have a fish scale microstructure; when the heat treatment temperature is higher than 850°C, the metal coating will be obviously melted and volatilized during the heat treatment, resulting in The final obtained electrode wire material also does not have obvious fish-like scale microstructure. When the heat treatment time at the heat treatment temperature is greater than 60s, the metal coating is also prone to obvious melting and volatilization, and the final obtained electrode wire material also fails to have an obvious imitation fish scale microstructure; when heat treatment at the heat treatment temperature When the time is less than 5 s, the final wire electrode material also does not have an obvious imitation fish scale microstructure.

In another preferred example, the heat treatment temperature of the heat treatment in step 1) is 580-830°C, preferably 600-800°C.

In another preferred example, the heat treatment time in step 1) at the heat treatment temperature is 8-55s, preferably 10s-50s.

In another preferred example, the heat treatment in step 1) includes (but not limited to): resistance heating, radiation heating, or a combination thereof.

In another preferred example, the heat treatment in step 1) is a composite heating method of resistance heating and radiation heating.

In another preferred example, the resistance heating is performed by the resistance heating of the coating electrode wire itself. When resistance heating is used, the power applied to the coating electrode wire is 0.1-10KW, preferably 0.3-5KW.

In another preferred example, the radiation treatment temperature in the radiation heating zone is 550-850°C, preferably 600-800°C.

In another preferred example, the radiation treatment time at the radiation treatment temperature is 5-60s, preferably 15-30s.

In another preferred example, the diameter of the heat-treated electrode wire is 0.03-5 mm, preferably 0.05-4.5 mm.

In another preferred example, the heat-treated wire electrode includes: a first inner layer, a first middle layer and a first outer layer.

In another preferred example, the diameter of the first inner layer is 0.02-4 mm, preferably 0.5-3 mm.

In another preferred example, the thickness of the first intermediate layer is 3-30 μm, preferably 5-20 μm.

In another preferred example, the thickness of the first outer layer is 2-20 μm, preferably 5-10 μm.

In another preferred example, the drawing treatment in step 2) is carried out in a lubricating oil tank; and/or

Step 2) the drawing treatment is carried out at room temperature; and/or

Step 2) The drawing speed of the drawing treatment is 600-1500m/min.

It should be understood that in the preparation method of the present invention, when the drawing speed of step 2) is greater than 1500m/min, the drawn electrode wire is very easy to break during the drawing process; When the drawing speed is less than 600m/min, the electrode wire material obtained after the drawing does not have an obvious imitation fish scale microstructure.

In another preferred example, the drawing speed of the drawing treatment in step 2) is 700-1400m/min, preferably 800-1300m/min.

In another preferred example, the diameter of the drawn electrode wire is 0.1-1 mm, preferably 0.15-0.6 mm.

In another preferred example, the annealing temperature of the annealing treatment in step 3) is 20-100°C; and/or

Step 3) The annealing time of the annealing treatment at the annealing temperature is 1s-20s.

In another preferred example, the annealing temperature of the annealing treatment in step 3) is 30°C-80°C, preferably 35-70°C.

In another preferred example, the annealing treatment time in step 3) at the annealing treatment temperature is 3-15s, preferably 4-10s.

In another preferred example, the annealing treatment in step 3) is carried out by electrically heating the wire-wound copper roll, and the voltage is 10-50V and the current is 5-30A during the annealing treatment.

application

The present invention also provides an application of the electrode wire material for precision cutting.

The present invention also provides a product, which contains or is made of the wire electrode material.

Compared with the prior art, the present invention has the following main advantages:

(1) The surface of the electrode wire material has a fish scale-like micro-texture. This special bionic structure enables the electrode wire material to have an excellent cooling effect on the cooling liquid, so that a higher cutting rate can be obtained, and the obtained electrode can be significantly improved. The performance of the wire material, such as cutting speed, is 10% to 20% higher than that of ordinary copper electrode wire with zinc coating, and at least 23% higher than that of ordinary copper wire without zinc coating;

(2) The special imitation fish scale micro-texture on the surface of the electrode wire material makes it have very low cutting resistance during the cutting process, and can discharge abrasive debris very smoothly, which is beneficial to increase the cutting speed without reducing the cutting sample. Surface roughness;

(3) The preparation method of the wire electrode material has the advantages of simple process, low cost, and easy industrial production.

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. For the experimental methods without specific conditions indicated in the following examples, usually follow the conventional conditions or the conditions suggested by the manufacturer. Percentages and parts are by weight unless otherwise indicated.

Unless otherwise defined, all professional and scientific terms used herein have the same meanings as commonly understood by those skilled in the art. In addition, any methods and materials similar or equivalent to those described can be applied to the method of the present invention. The preferred implementation methods and materials described herein are for demonstration purposes only.

Embodiment 1 Electrode wire material 1

(1) Copper alloy wire galvanizing: first put the copper alloy wire with a diameter of about 1.5mm after derusting and degreasing cleaning into the electroplating equipment for galvanizing treatment, and obtain the thickness of the zinc coating by adjusting the galvanizing process A copper alloy wire 1 of approximately 5 μm.

(2) Diffusion heat treatment: Diffusion heat treatment is performed on the copper alloy wire 1, and the heating method is selected as resistance/radiation composite heating, so that the copper alloy wire 1 passes through a resistance furnace with a temperature of 750°C and a length of 1m at 0.05m/s At the same time, the power applied to this section of wire is 1KW (the equivalent heat treatment temperature of the composite heating method in this embodiment is 800°C, and the equivalent heat treatment time is 20s), and a three-layer composite material with a metal coating, an interdiffusion layer and a copper alloy matrix layer is obtained. The layered wire blank 1 has a diameter of approximately 1.5 mm.

(3) Drawing treatment: draw the above-mentioned micro-textured electrode wire with a diameter of 0.25mm at a drawing speed of 1000m/min, and then use a voltage of 30V and a current of 10A (for the wire, its equivalent The annealing temperature is 40° C.), and the stress relief annealing treatment is performed for 5 s to obtain the wire electrode material 1 .

result

The heat-treated three-layer wire blank 1 and the obtained wire electrode material 1 in Example 1 were tested for surface and cross-sectional morphology and component analysis, contact angle and cutting performance.

FIG. 3 is the SEM cross-sectional morphology test result of the heat-treated three-layer wire blank 1 in Example 1. FIG.

It can be seen from Figure 3 that after heat treatment, the obtained wire blank 1 has a three-layer structure, including an alloy matrix layer, an interdiffusion layer and a metal coating, wherein the diameter of the alloy matrix layer is 1.25 mm, and the thickness of the interdiffusion layer is 12 μm , the thickness of the metal coating is 4 μm.

The components of sites 1, 2, 3, 4, 5, 6 and 7 in Figure 3 were further tested by an energy spectrometer, and the results are shown in Table 1.

Table 1

It can be seen from Table 1 that the content of Zn in the heat-treated three-layer wire blank 1 along the radial direction (i.e. from position 1 to 7) gradually decreases, and the content of Cu gradually increases due to the heat treatment process. It is carried out in a high-temperature air atmosphere, so there is also a trace amount of O on the outer layer. The above results show that: during the heat treatment process, the zinc coating and the base alloy undergo obvious interdiffusion, forming a three-layer structure including the alloy base layer, the interdiffusion layer and the metal coating.

Fig. 4 is the SEM surface topography test result of the electrode wire material 1 obtained in Example 1, wherein (a) is the fish scale topography, and (b) is the enlarged SEM surface topography of the electrode wire material 1.

It can be seen from Fig. 4 that the microscopic surface of the electrode wire material 1 obtained in Example 1 has a fish scale microtexture with a very high degree of simulation, and the diameter of the obtained electrode wire material 1 is 0.25 mm.

FIG. 5 is the SEM cross-sectional morphology test result of the wire electrode material 1 obtained in Example 1. FIG.

It can be seen from Fig. 5 that the electrode wire material 1 obtained in Example 1 has a three-layer structure, including an alloy matrix layer, an interdiffusion layer and a biomimetic coating, wherein the diameter of the alloy matrix layer is 0.25 mm, and the thickness of the interdiffusion layer is 15 μm. The thickness of the metal plating layer was 5 μm.

The components of sites 1, 2, 3, 4, 5 and 6 in Figure 5 were further tested by an energy spectrometer, and the results are shown in Table 2.

Table 2

It can be seen from Table 2 that the Zn content of the obtained electrode wire material 1 gradually decreases along the radial direction (ie, from position 1 to 6) from the outside to the inside, and the Cu content gradually increases, and there is still a small amount of O in the outer layer. The above results further show that the obtained fish scale micro-textured electrode wire material also has a three-layer structure.

Fig. 6 is the contact angle test result of copper alloy wire (i.e. copper alloy wire without coating), copper alloy wire 1 (i.e. copper alloy wire with zinc coating) and electrode wire material 1 with cooling liquid, wherein (a) is the copper alloy wire, (b) is the copper alloy wire 1, (c) and (d) are the fish scale micro-textured electrode wire material 1.

As can be seen from Fig. 6, compared with the copper alloy wire material not coated with zinc coating and the copper alloy wire material only coated with zinc coating, the electrode wire material 1 with specific imitation fish scale micro-texture of the present invention is compatible with cooling. The liquid has a larger contact angle, which can significantly improve the lubricating effect of the cooling liquid on the electrode wire material during the cutting process.

FIG. 7 is a graph comparing the relative cutting speeds of copper alloy wire, copper alloy wire 1 and electrode wire material 1. FIG.

As can be seen from Fig. 7, the cutting speed of the fish scale micro-textured electrode wire material 1 of the present invention is increased by about 23% compared with the common non-galvanized copper alloy wire material, and compared with the copper alloy wire material with galvanized layer. Wire 1 cut speed increased by about 16%.

Fig. 8 is the test results of the three-dimensional shape of the mold steel sample after being cut by copper alloy wire 1 and electrode wire material 1 respectively at the same cutting speed, where (a) is the three-dimensional shape of the sample after being cut by copper alloy wire 1 (b) is the three-dimensional morphology after cutting the fish scale micro-textured electrode wire material 1.

It can be seen from FIG. 8 that the surface roughness of the sample cut by the fish scale micro-textured electrode wire material 1 is equivalent to that of the sample cut by the copper alloy wire 1 .

In addition, the test results of mechanical properties of copper alloy wire, copper alloy wire 1 and electrode wire material 1 show that the three have equivalent tensile strength (about 1100 MPa) and elongation (about 5%).

Example 2 Electrode wire material 2

(1) Copper alloy wire galvanizing: first put the copper alloy wire with a diameter of about 1 mm after derusting and degreasing cleaning into the electroplating equipment, and perform galvanizing treatment. The thickness of the zinc coating is obtained by adjusting the galvanizing process. 10 μm copper alloy wire 2;

(2) Diffusion heat treatment: Diffusion heat treatment is carried out on the copper alloy wire 2, and the heating method is selected as resistance/radiation composite heating, so that the copper alloy wire 2 passes through a resistance furnace with a temperature of 650°C and a length of 1m at 0.02m/s At the same time, the power applied to this section of wire is 0.5KW (the equivalent heat treatment temperature of the composite heating method in this embodiment is 690°C, and the equivalent heat treatment time is 50s), and a metal coating layer, an interdiffusion layer and a copper alloy matrix layer are obtained. The wire material blank 2 of the three-layer structure has a diameter of 1.5 mm;

(3) Drawing treatment: the above-mentioned heat-treated three-layer wire material blank 2 is drawn into a micro-textured electrode wire with a diameter of 0.25 mm at a drawing speed of 1200 m/min, and then the wire is drawn with a voltage of 30 V and a current of 10A (for the wire material, its equivalent annealing temperature is 40° C.) is subjected to stress relief annealing treatment for 5 s to obtain wire electrode material 2 .

Embodiment 3 Electrode wire material 3

(1) Copper alloy wire galvanizing: first put the copper alloy wire with a diameter of 1.2 mm after derusting and degreasing cleaning into the electroplating equipment, and perform galvanizing treatment. The thickness of the zinc coating is obtained by adjusting the galvanizing process. 10 μm copper alloy wire 3 .

(2) Diffusion heat treatment: Diffusion heat treatment is performed on the copper alloy wire 1, and the heating method is selected as resistance/radiation composite heating, so that the copper alloy wire 3 passes through a resistance furnace with a temperature of 680°C and a length of 1m at 0.1m/s At the same time, the power applied to this section of wire is 1KW (the equivalent heat treatment temperature of the composite heating method in this embodiment is 710°C, and the equivalent heat treatment time is 10s), and a three-layer composite material with a metal coating, an interdiffusion layer and a copper alloy matrix layer is obtained. Layer structured wire blank 3 .

(3) Drawing treatment: draw the above-mentioned heat-treated three-layer wire material blank 3 at a drawing speed of 1000m/min into a micro-textured electrode wire with a diameter of 0.2mm, and then use a voltage of 30V and a current of 10A (For the wire material, the equivalent annealing temperature is 40° C.) Stress relief annealing treatment was performed for 5 s to obtain the wire electrode material 3 .

Embodiment 4 Electrode wire material 4

(1) Copper alloy wire galvanizing: first put the copper alloy wire with a diameter of 1.5 mm after derusting and degreasing cleaning into the electroplating equipment, and perform galvanizing treatment. The thickness of the zinc coating is obtained by adjusting the galvanizing process. 8μm copper alloy wire 4;

(2) Diffusion heat treatment: Diffusion heat treatment is carried out on the copper alloy wire 4, and the heating method is selected as resistance/radiation composite heating, so that the copper alloy wire 4 passes through a resistance furnace with a temperature of 700°C and a length of 1m at 0.05m/s At the same time, the power applied to this section of wire is 1.5KW (the equivalent heat treatment temperature of the composite heating method in this embodiment is 780°C, and the equivalent heat treatment time is 20s), and a metal coating layer, an interdiffusion layer and a copper alloy matrix layer are obtained. Three-layer wire material blank 4;

(3) Drawing treatment: the above-mentioned heat-treated three-layer wire material blank 4 is drawn into a micro-textured electrode wire with a diameter of 0.3mm at a drawing speed of 800m/min, and then the electrode wire is drawn with a voltage of 30V and a current of 10A. (For the wire material, the equivalent annealing temperature is 40° C.) Stress relief annealing treatment was performed for 5 s to obtain the wire electrode material 4 .

result

Fig. 9 is the SEM surface topography test result of electrode wire material 2-4 obtained in Example 2-4, wherein (a) is electrode wire material 2, (b) is electrode wire material 3, and (c) is electrode wire material 4 .

It can be seen from FIG. 9 that the electrode wire materials 2-4 obtained after the specific electroplating treatment process, heat treatment process, drawing treatment process and annealing treatment process of the present invention all present the surface morphology of fish scale micro-texture.

Comparative example 1 electrode wire material C1

Same as Example 1, the difference is that the heat treatment temperature is 500°C.

result

FIG. 10 is the SEM surface morphology test result of the wire electrode material C1 obtained in Comparative Example 1.

It can be seen from Figure 10 that after the heat treatment temperature described in Comparative Example 1, no obvious imitation fish scale structure appeared on the surface of the obtained wire electrode material C1. The cutting speed of the galvanized copper wire is basically unchanged.

Comparative example 2 electrode wire material C2

With embodiment 1, difference is: heat treatment temperature is 880 ℃

result

Fig. 11 is the SEM surface morphology test result of the wire electrode material C2 obtained in Comparative Example 2.

It can be seen from Figure 11 that a large number of micro-cracks appeared on the surface of the wire electrode material C2 obtained at this heat treatment temperature, and no obvious micro-texture was found. Conventional galvanized copper wire, its cutting speed is basically unchanged.

All documents mentioned in this application are incorporated by reference in this application as if each were individually incorporated by reference. In addition, it should be understood that after reading the above teaching content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims (10)

1. A wire electrode material, characterized in that the surface of the wire electrode material has an imitation fish scale microtexture layer, and the wire electrode material comprises: i) an alloy matrix layer as an inner layer; ii) an interdiffusion layer as an intermediate layer; and iii) plating as an outer layer; Moreover, the contact angle of the electrode wire material to the cooling liquid is 105-150°. 2. The electrode wire material according to claim 1, characterized in that, the contact angle of the electrode wire material to the cooling liquid is 107-140°. 3. The electrode wire material according to claim 1, characterized in that, in the electrode wire material, the diameter of the inner layer is 0.15-0.6 mm; and/or The thickness of the intermediate layer is 5-30 μm; and/or The thickness of the outer layer is 2-20 μm. 4. The electrode wire material according to claim 1, characterized in that, the thickness of the fish scale-like micro-texture layer is 2-20 μm. 5. A preparation method of the electrode wire material according to claim 1, characterized in that, comprising the steps of: 1) providing a coated electrode wire, and heat-treating the coated electrode wire to obtain a heat-treated electrode wire; 2) The heat-treated wire electrode obtained in the drawing treatment step 1) to obtain the drawn wire electrode; and 3) The annealing treatment step 2) obtains the drawn electrode wire to obtain the electrode wire material described in claim 1 . 6. The method according to claim 5, characterized in that, the heat treatment temperature of the heat treatment in step 1) is 550-850°C; and/or Step 1) The heat treatment time at the heat treatment temperature is 5s-60s. 7. The method according to claim 5, characterized in that, step 2) the drawing process is carried out in a lubricating oil tank; and/or Step 2) the drawing treatment is carried out at room temperature; and/or Step 2) The drawing speed of the drawing treatment is 600-1500m/min. 8. The method according to claim 5, characterized in that the annealing temperature of the annealing treatment in step 3) is 20-100°C; and/or Step 3) The annealing time of the annealing treatment at the annealing temperature is 1s-20s. 9. The use of the electrode wire material according to claim 1, characterized in that it is used for precision cutting. 10. A product, characterized in that the product contains or is made of the wire electrode material according to claim 1.